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HC5
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User Manual
Rev. 1.0L - 11/02/02
Trimmer TR7 adjustment
•
The trimmer TR7 must be turned completely counter-clockwise, to protect the
input channel to the CPU.
FOLBACK intervention adjustment
•
Be sure that the exciter is not operative.
•
Measure the voltage on the PIN1 of JP7 on the power supply card with a
multimeter, than rotate the trimmer TR9 to obtain a voltage of 0V.
Forward power reading adjustment
•
Increase to 5000W at 98MHz, using as a reference the reading on the wattmeter
that possibly has been connected at the end of the attenuation chain at the RF
output.
•
Rotate TR1 to read on the display the same value measured with the wattmeter.
Reflected power adjustment
•
Apply an unbalanced load in series with a 50 Ohm load and apply in series a
by-pass wattmeter BIRD.
•
Increase slowly the exciter power to obtain a reflected power of 500W at 98MHz.
•
Adjust TR2 to read on the display the same value measured with the wattmeter.
VPA reading adjustment
•
For the hybrid combiner this reading is disabled.
IPA measurement adjustment
•
For the hybrid combiner this reading is disabled.
Input power reading adjustment
•
Connect to the RF input a by-pass wattmeter BIRD with a full-scale of 10 W.
•
Connect a 50Ohm load to the exit and increase slowly the exciter power to
obtain 5W on the instrument in series to the input.
•
Rotate TR3 on the CPU assembly to read on the display the correct value
measured with the wattmeter.
Summary of Contents for HC5
Page 1: ...Manufactured by Italy HC5 User Manual LCD version...
Page 4: ...HC5 ii User Manual Rev 1 0L 11 02 02 This page was intentionally left blank...
Page 6: ...HC5 2 34 User Manual Rev 1 0L 11 02 02 This page was intentionally left blank...
Page 22: ...HC5 18 34 User Manual Rev 1 0L 11 02 02 This page was intentionally left blank...
Page 28: ...HC5 24 34 User Manual Rev 1 0L 11 02 02 This page was intentionally left blank...